[nvidia] Attempts to fix flicker

Switch to nouveau

nixos/flake.nix

@@ -45,6 +45,7 @@
         "spotify"
         "steam" "steam-original" "steam-run"
         "vista-fonts"
+        "nvidia-persistenced" # Docker
       ];
     in
     utils.lib.mkFlake {

nixos/hosts/Tibo-NixFat/default.nix

@@ -6,6 +6,8 @@
   ];
 
   sisyphus = {
+    desktop.sway.enable = true;
+
     hardware.nvidia = {
       enable = true;
       model = "Quadro T2000";

nixos/modules/desktop/sway/default.nix

@@ -38,6 +38,26 @@ let
       export XDG_DATA_DIRS=${datadir}:$XDG_DATA_DIRS
       gnome_schema=org.gnome.desktop.interface
       # gsettings set $gnome_schema gtk-theme 'Dracula'
+
+      # https://github.com/crispyricepc/sway-nvidia/blob/2101a18698151a61266740f1297158119bf660ac/wlroots-env-nvidia.sh
+      # Hardware cursors not yet working on wlroots
+      export WLR_NO_HARDWARE_CURSORS=1
+      # Set wlroots renderer to Vulkan to avoid flickering
+      export WLR_RENDERER=vulkan
+      # General wayland environment variables
+      export XDG_SESSION_TYPE=wayland
+      export QT_QPA_PLATFORM=wayland
+      export QT_WAYLAND_DISABLE_WINDOWDECORATION=1
+      # Firefox wayland environment variable
+      export MOZ_ENABLE_WAYLAND=1
+      export MOZ_USE_XINPUT2=1
+      # OpenGL Variables
+      export GBM_BACKEND=nvidia-drm
+      export __GL_GSYNC_ALLOWED=0
+      export __GL_VRR_ALLOWED=0
+      export __GLX_VENDOR_LIBRARY_NAME=nvidia
+      # Xwayland compatibility
+      export XWAYLAND_NO_GLAMOR=1
     '';
   };
 in {
@@ -100,7 +120,8 @@ in {
 
       power-profiles-daemon.enable = true;
 
-      xserver.displayManager.session = [{
+      xserver = {
+        displayManager.session = [{
           manage = "window";
           name = "Sway";
           start = ''
@@ -108,6 +129,8 @@ in {
             waitPID=$!
           '';
         }];
+        videoDrivers = [ "nouveau" ];
+      };
     };
     
     xdg.portal = {

nixos/modules/hardware/nvidia/default.nix

@@ -3,6 +3,7 @@
 let
   cfg = config.sisyphus.hardware.nvidia;
 
+  # The graphics cards for which to do offloading
   do-offloading = builtins.elem cfg.model [ "Quadro T2000" ];
   nvidia-offload = pkgs.writeShellScriptBin "nvidia-offload" ''
     export __NV_PRIME_RENDER_OFFLOAD=1
@@ -24,7 +25,16 @@ in {
   };
 
   config = lib.mkIf cfg.enable {
-    services.xserver.videoDrivers = [ "nvidia" ];
+#    boot = {
+#      extraModprobeConfig = "options nvidia-drm modeset=1";
+#
+#      initrd.kernelModules = [
+#        "nvidia"
+#        "nvidia_modeset"
+#        "nvidia_uvm"
+#        "nvidia_drm"
+#      ];
+#    };
 
     hardware = {
       opengl = {
@@ -33,7 +43,7 @@ in {
         driSupport32Bit = true;
       };
       nvidia = {
-        open = true;
+        open = false;
         package = config.boot.kernelPackages.nvidiaPackages.stable;
         modesetting.enable = true;
         nvidiaSettings = cfg.gui-settings;
@@ -42,6 +52,9 @@ in {
           finegrained = do-offloading;
         };
 
+        # Avoid flickering
+        forceFullCompositionPipeline = true;
+
         prime = lib.mkMerge [
           (lib.mkIf do-offloading {
             offload = {